Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Haloacetic acids (HAA5)

Anson County Water System

Haloacetic acids are formed when disinfectants such as chlorine are added to tap water. The group of five haloacetic acids regulated by federal standards includes monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid and dibromoacetic acid. Read More.

Haloacetic acids are harmful during pregnancy and may increase the risk of cancer. Haloacetic acids are� genotoxic, which means that they induce mutations and DNA damage. Multiple studies by the National Toxicology Program have demonstrated the cancer-causing properties of individual haloacetic acids in laboratory animals. The Department of Health and Human Services is currently considering listing di- or tri-haloacetic acids for possible inclusion in its comprehensive Report on Carcinogens.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

113

Samples

12

Samples exceeding legal limit (MCL)

112

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201448.6 ppb242430.0 ppb - 84.0 ppb
201545.9 ppb161624.0 ppb - 64.0 ppb
201635.7 ppb161626.0 ppb - 52.0 ppb
201744.9 ppb161629.0 ppb - 65.0 ppb
201842.6 ppb2423ND - 62.0 ppb
201934.5 ppb171720.0 ppb - 53.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for the group of five haloacetic acids, or HAA5, was defined in a peer-reviewed scientific study by EWG and represents a one-in-a-million lifetime cancer risk level. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 60 ppb

The legal limit for the group of five haloacetic acids (HAA5), established in 1998, was based on the need for residual disinfectant levels in water served to customers and the cost of treatment. This limit does not fully protect against the risk of cancer and harm to the developing fetus due to exposure to haloacetic acids.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-2692195050001DIS-233.0 ppb
2014-03-2692195050002DIS-230.0 ppb
2014-03-2692195050003DIS-233.0 ppb
2014-03-2692195050004DIS-233.0 ppb
2014-03-2692195050001TTH-234.0 ppb
2014-03-2692195050002TTH-230.0 ppb
2014-03-2692195050003TTH-233.0 ppb
2014-03-2692195050004TTH-234.0 ppb
2014-05-2192202517001TTH-263.0 ppb
2014-05-2192202517002TTH-264.0 ppb
2014-05-2192202517003TTH-284.0 ppb
2014-05-2192202517004TTH-271.0 ppb
2014-05-2192202517001DIS-263.0 ppb
2014-05-2192202517002DIS-260.0 ppb
2014-05-2192202517003DIS-284.0 ppb
2014-05-2192202517004DIS-271.0 ppb
2014-08-2292214563001TTH-252.0 ppb
2014-08-2292214563002TTH-249.0 ppb
2014-08-2292214563003TTH-250.0 ppb
2014-08-2292214563004TTH-247.0 ppb
2014-11-1892226519001TTH-237.0 ppb
2014-11-1892226519002TTH-238.0 ppb
2014-11-1892226519003TTH-236.0 ppb
2014-11-1892226519004TTH-238.0 ppb
2015-02-1826.0 ppb
2015-02-1825.0 ppb
2015-02-1824.0 ppb
2015-02-1835.0 ppb
2015-05-2046.0 ppb
2015-05-2035.0 ppb
2015-05-2050.0 ppb
2015-05-2054.0 ppb
2015-08-1950.0 ppb
2015-08-1953.0 ppb
2015-08-1949.0 ppb
2015-08-1964.0 ppb
2015-11-1860.5 ppb
2015-11-1851.0 ppb
2015-11-1852.0 ppb
2015-11-1860.0 ppb
2016-02-1792287116001TTH-227.0 ppb
2016-02-1792287116002TTH-227.0 ppb
2016-02-1792287116003TTH-228.0 ppb
2016-02-1792287116004TTH-226.0 ppb
2016-05-1992298434001TTH-234.0 ppb
2016-05-1992298434002TTH-233.0 ppb
2016-05-1992298434003TTH-240.0 ppb
2016-05-1992298434004TTH-233.0 ppb
2016-08-1792309424001TTH-250.0 ppb
2016-08-1792309424002TTH-250.0 ppb
2016-08-1792309424003TTH-247.0 ppb
2016-08-1792309424004TTH-252.0 ppb
2016-11-1692320211001TTH-228.0 ppb
2016-11-1692320211002TTH-229.0 ppb
2016-11-1692320211003TTH-228.0 ppb
2016-11-1692320211004TTH-239.0 ppb
2017-02-1592330355001TTH37.0 ppb
2017-02-1592330355002TTH29.0 ppb
2017-02-1592330355003TTH32.0 ppb
2017-02-1592330355004TTH42.0 ppb
2017-05-1292341157001TTH48.0 ppb
2017-05-1292341157002TTH60.0 ppb
2017-05-1292341157003TTH65.0 ppb
2017-05-1292341157004TTH53.0 ppb
2017-08-1692352111001TTH55.0 ppb
2017-08-1692352111002TTH59.0 ppb
2017-08-1692352111005TTH55.0 ppb
2017-08-1792352111004TTH58.0 ppb
2017-11-1592363800001TTH30.0 ppb
2017-11-1592363800002TTH33.0 ppb
2017-11-1592363800003TTH31.0 ppb
2017-11-1592363800004TTH31.0 ppb
2018-02-1492373624005TTH 38.0 ppb
2018-02-1492373624006TTH 37.0 ppb
2018-02-1492373624007TTH 39.0 ppb
2018-02-1492373624008TTH 42.0 ppb
2018-05-0992384772001TTH 49.0 ppb
2018-05-0992384772002TTH 52.0 ppb
2018-05-0992384772003TTH 50.0 ppb
2018-05-0992384772004TTH 47.0 ppb
2018-08-0992395748001TTH 58.0 ppb
2018-08-0992395748002TTH 62.0 ppb
2018-08-0992395748003TTH 61.0 ppb
2018-08-0992395748004TTH 53.0 ppb
2018-11-282424-18 ND
2018-11-282425-18 38.0 ppb
2018-11-282426-18 37.0 ppb
2018-11-282427-18 47.0 ppb
2018-11-2892409452002 34.0 ppb
2018-11-2892409452002_377034.0 ppb
2018-11-2892409452003 42.0 ppb
2018-11-2892409452003_377042.0 ppb
2018-11-2892409452004 40.0 ppb
2018-11-2892409452004_377040.0 ppb
2018-11-2892409452005 40.0 ppb
2018-11-2892409452005_377040.0 ppb
2019-02-1292418267001_377026.0 ppb
2019-02-1292418267002_377025.0 ppb
2019-02-1292418267003_377027.0 ppb
2019-02-1292418267004_377023.0 ppb
2019-05-2292430651001_377053.0 ppb
2019-05-2292430651002_377043.0 ppb
2019-05-2292430651003_377042.0 ppb
2019-05-2292430651004_377048.0 ppb
2019-08-1492442133002_377042.0 ppb
2019-08-1492442133004_377047.0 ppb
2019-08-2092442133001_377050.0 ppb
2019-08-2692442996001_377050.0 ppb
2019-11-1992455540001_377020.0 ppb
2019-11-1992455540002_377023.0 ppb
2019-11-1992455540003_377021.0 ppb
2019-11-1992455540004_377020.0 ppb
2019-12-0492457286001_377026.0 ppb